She's the pitcher of Yokohama Little baseball team. She first meets Goro when he helps saves a cat in the tree and soon after Goro develops a crush on her.

Honda Shigeharu is a Major League batter on the rise. His son Goro is a Little League pitcher who one day hopes to follow in his father's footsteps. Hoshino Momoko is Goro's schoolteacher, and the first woman Shigeharu has been interested in since the death of Goro's mother. The destines of these three individuals will become intertwined as father and son experience both heartbreak and triumph on the baseball diamond. But when an unspeakable tragedy visits the family, it will take everything they have to pick up the pieces and reclaim their dreams.
 
(Source: Anime News Network)

After the baseball season was over, Goro returned to Japan. There he learned from Toshi that there is going to be a Baseball World Cup the following year hosted in America. 
(Source: AniDB)

After leaving Kaido in a promise to meet them at the Koshien tournament, Goro comes back to his home town once again in an attempt to join up with his old friends. Only this time, things aren't as easy to get back in the groove of.

This series picks up a few years after season one. Goro is now older, and has come back to his original home town. As if nothing changed, he starts off right where he left with his old friends and tries to fit back in.

The story of Major follows the life of Goro Honda, from kindergarten to being a professional baseball player, seeking and overcoming tremendous challenges.

Ryoko Kawase